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Kepler Mission

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Kepler FAQ

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Kepler Mission

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Table 1: Key spacecraft parameters

Spacecraft dimensions

The overall size is about 2.7 m in diameter and 4.7 m high.

Spacecraft mass

Launch mass of 1052.4 kg, consisting of 562.7 kg for the spacecraft, 478 kg for the photometer, and 11.7 kg of hydrazine propellant

Power

Power is provided by four non-coplanar panels with a total area of 10.2 m2 of solar collecting surface area. Combined, the 2860 individual solar cells can produce over 1,100 W.. Power storage is provided by a 20 Amp-hour rechargeable lithium-ion battery.

Fine pointing

The spacecraft is three-access stabilized to better than 9 milliarcseconds, 3σ over 15 minutes using fine-guidance sensors located on the instrument focal plane.

Telemetry

X-band is used for uplink commanding and realtime engineering data downlinking. Ka-band is used to downlink the stored science and engineering data.

Data storage capability

About 60 days